The youngest brother of GGG's Kazuo Ushiyama, a member of Mamoru Amami's class. Knowledgeable about military equipment. Looks up to his eldest brother, as he's aware that he's a member of GGG; aspires to be like him when he grows up and boasts about his exploits often to his fellow classmates, making no attempt to keep them a secret. His name, Sueo, literally means "last-born." For much of the television series, has an unfortunate tendency to be knocked unconscious.